Finding Domain and Range of a Function using a Graph

[oratnek0227]

is it possible to have a graph pointing infinitly in every direction? up down left right

[patrickJMT]

@oratnek0227 a curve, yes. but that is not a function, so you will not encounter much stuff like that.

[JJonesSilver]

@4:07 does it matter if I put (-6, -infinity) instead of (-infinity,-6)?

[patrickJMT]

@JJonesSilver yes, that is incorrect notation.

[spartans12able]

I love you bro you saved me

[Dbeats62]

I..love...you

[princesssoso1000]

omg this is the 1st time i ever i get the "domain"" !!! thanksssssssssssss a lotttttttt !!!!

[YouMaryMary1]

seriously.................than­k you.

[Mrsuperboss6969]

Learned more in 5 minuets than a week of class... Thank you

[SHE37]

thank you so much :')

[thepookchops]

Thanks for the help!

[melaneecuneapen]

thank you sooo much, this was so helpful <3

[ItsurGurlAshalay2008]

my teacher does it differently so im really confused here

[briannaxo4]

You're so going to help me pass my midterm for pre-calc! Thank you! :)

[patrickJMT]

@briannaxo4 good luck!

[nibloske567]

forever and ever and ever and ever

[poprocksandpuppies]

Why in your last problem did you not join the Domain with a U?

[Awesomedude50]

i have a Pre-cal semester exam tomorrow and this helped me SO MUCH!!! Thank you!

[KyleLikesVodka]

I LOVE U!! my prof could not make it seem more complicated. This semester = youtube for my calculus!!

[animelovergal2002]

I find this guys Math videos entertaining.

Wish he was my teacher, cause my math teacher, is confusing, takes too fast, and works problems fast, and sometimes not finishing em.

I'm half way asleep and hardly understand a thing he's saying, I need to get some sleep, and then my little brain will work at its full strength again

[Ccarlsone]

am i the only one who finds this entertaining to watch?

[melissaluver11]

Thaaaaaaaanx I can do my pre cal homework :D

[SearchingF0rTheTruth]

this helped alot!!

[photomasterist]

why arent the domain and range in union but separated with a comma?

[sackTizzle]

have a video to find domain and range of polynomial functions ex:( x^5 + x^4 - (x+2)^2 ) ?

[NikeLeBronJames]

I have a question. Is you graph this using a graphing calculator, how do you know if your answer is in paranthesis or braquets?! My pre-cal teacher isn't good :(

[ericksonmpe]

@NikeLeBronJames brackets mean the number is included in the domain, a parenthese means the number is not included so that number is not part of the domain/range

[louthomasTV]

This video = 5 extra points on my test today :D

[patrickJMT]

@louthomasTV : ) 

[The3nlightened0ne]

@louthomasTV cheater!

[kelpfusion]

I am so blessed to have you in my life!!!

[ziadtn100]

thanks great work

[23Labron431]

You are the best teacher I have a test on this in two days and I didn't understand it at all now it's all clear thank you:)

[patrickJMT]

@23Labron431 good luck : ) spread the word to your friends about the videos!

[iSuad09]

i wish if you are my teacher

[McCloud95]

I almost cried out of frustration because I didn't understand this, but this video pretty much opened up a new world to me. I give my sincere thanks :)

[TheCapnPorridge]

@McCloud95 me too man.. the frustration.... it hurts. :(

[patrickJMT]

@TheCapnPorridge eh, that's math. more generally, it is like learning anything new. it takes time. some people expect to understand it instantly and just get pissed and give up when that does not happen. (not that you are behaving this way). ya just gotta hang in there and stick with it.

[jcrrice100]

i love you so much! Thank you! ♥

[amvien]

very helpful. thank you

[G0twood]

Thanks for the homework help

[superhornetfan]

Thanks a ton

[HikariChi03]

Thank you so much, after a year of confusion I finally get this. ^_^

[medongata]

could anybody tell me ..

why -6, s not included..??

[Adamd895]

Thank you man

[renato989]

BRO!!!!!!!!!!!!!!!!!!!! is there a way to donate you some money??you are the shit bro.....my pre-calculus professor is an old guy from Russia with a VERY STRONG accent.....no body can understand what he says and he doesnt know how to teach....he just reads power point presentations....:(......u rock bro.....wish all math teachers were like you.....

[patrickJMT]

@renato989 you can visit my website (patrickjmt dizot comcom), click on a link, and a donation button pops up beside it : ) much obliged

[patrickJMT]

@renato989 i can not type in the domain name correctly as youtube filters them : )

[DylanChilcoat]

What if two of the coordinates are the same?

Ex: (8,6) and (8,7) What do you put for the domain? Just 8?

[123mmm101]

Really helped! Thanks!!

[313Darnell313]

could u tell me how to write it down using the form XER and YER?

[patrickJMT]

@313Darnell313 i have no idea what that means

[sarazuu]

@patrickJMT instead of writing the domain and range using the inifinity symbol, use y belongs to the set of real numbers or x belongs to the set of real numbers than state if they are greater, equal, or less than a numer

[dahhlingLCx24]

@patrickJMT he meant using this form : Domain = [xɛR (x belong to all regular numbers) and for example (-5,3) U (6, infiniti) ]

[ysphor]

@313Darnell313 you can write it in { x , xEr } as the possible domain. xEr mean all the domains are real numbers. hope that'd help you

[xoxmilahxox]

@313Darnell313 Omg I know what you're talking about but I don't know how to do it either! That weird "E" looking thing is supposed to stand for something...but the "R" means all real numbers! My teacher wants us to write it like that too...I can't use the infinity symbol :( I'm sooo lost :(

[Evelyynnnnn]

Thank youh so much!!:D

[bilibob32352]

Extremely helpful. Go into a teaching career.

[patrickJMT]

@bilibob32352 yes, nothing like a career of being underpaid, and under appreciated! nothing more fun than having a class full of students texting each other on their phones while you stand there and waste your time.

[patrickJMT]

@bilibob32352 but thanks for the compliment ; )

[DuhRollingStoner]

@patrickJMT Please help!!! In Algebra 1, We have this question for Domain and range for a Mapping Daigram and I have no idea which number goes to the next in the Y axis. Please help!! :(

[AsnLinh]

OH MY GOD. You should be my teacher..

[patrickJMT]

@AsnLinh keep watching and i will be : )

[owensutiono]

you are a lot BETTER than my teacher !

[GBeast18]

Thanx! This really helped me understand

[BabySnatcherz]

great job ! you really helped me to understand the piece wise graph.

[KThomas0123]

thanks for sharing!

[itsonlyyou04]

umm, how come my math teacher writes her domain this way: {x|x is a set of real numbers} and her range this way {y|y is > 0}. Her version is so different from this one that's why its a little confusing. Can you please explain? ^^ :)

[21BFL]

@itsonlyyou04 that is another way of showing the x and y ..

it is read like this x such that x is a set of real numbers and the y where y less than 0 .. i hope this helps :)

[Mezzano142]

@itsonlyyou04 For example, reading {y|y>0} would be y is the set of all real numbers such that ( | ) y is greater than 0. It's just saying the line will go on forever past 0, and must be greater than 0. Hope this helps.

[sosha20]

THANK YOU FOR POSTING!!!!!!!!!

[AnkushJainMusic]

Very useful, thank you very much! I've got a maths exam in a couple of weeks, and I just couldn't understand this before :)

[nodymnds4u]

you make it look so easy -_-

[shugalaxy]

What a concept. Thank you!

QUESTION THOUGH

For a parabola the domain will always be all real numbers, what about the range?

[crystalssunshine]

Thank you! I have a big exam tommorow this was very helpful! :)

[awininegeno]

hey how do you find the domain and range of a closed function?

[eauboi08]

Maestro what kind of function is (-5,0)?

thanks you helped me a lot....

in my assignment...

[UAEX110]

Thank you very much

[droxaragones]

i simply love your videos,, FOREVER AND EVER AND EVER AND EVER AND EVER!!!!

[droxaragones]

i simply love your videos,, FOREVER AND EVER AND EVER AND EVER AND EVER!!!!

[JackofallNutz]

Thank you very much! Your video helped quite a bit.

[1surenolove4life3]

Well idk the teacher at my school dont take the time to explain like you do....you should teach at our school lol

[1surenolove4life3]

teacher now and days are fucking lazy=(

[patrickJMT]

@1surenolove4life3 to say that all of any group of people are _______ (you fill in the blank) is pretty stupid.

[jezzr101]

@patrickJMT stupid people are stupid.

[Mezzano142]

@patrickJMT Fallacy of composition

[IdaWasHere94]

I love your handwriting! It should be its own font haha. Nice video too, thanks :D

[LilGTheTV]

WOW, you simply have put school math to practice!

I never thought this what I know now, how useful it can be for all kind of Internet Marketing.

[icecrunchisnowy]

you are touching forever and ever LMAO

[aurorabetty]

;)



[martylax1725]

Thanks Sir for your help. awsome

[MrAaabbasi]

Sir u r encrgng me! u r brilllllllllllllllllllllianttt­ttttt! thnx Sir!

[sn286656]

If your a math teacher, then id wanna be in your class

[barkingtree88]

thanks! this was helpful.

[love2liveit]

This is awesome! I wish teachers cold teach like this! :\

Anywho. How would you find the range of a graph with two flat lines above eachother? Kind of like this.. please help o---------

--------o

[xxWarZonexx]

I'm gonna keep touching it forever and ever and ever and ever and EVER! Briliant XD good vid though ;)

[drozzxo]

yourr great!!! 

[NViES]

I hate my teacher.... I no he wants us to do good, but he's such an ass.

[ahsanjahangir99]

Thank you bro :)

[TheFaytLengrod]

These videos are a life saver :S I do online school so I don't even look at the lessons anymore because I know I can just come on here and learn what I need in 2-5 minutes instead of spending like 30-45 minutes going over a lesson and still not understanding everything! Thanks a lot for these videos ;)

[normandie350]

why arent all math teachers talkative like u dude?

[adominooo]

youre a god... thanks so much im taking ab calc and my teacher is incompetent

[KapesBook]

i hate algebra and my professor

but thanks for the vid! :)

[LuzB]

Why it use brackets?

[shugalaxy]

@LuzB it indicates the graph absolutely touch that point

[alondragonz2009]

thanzz soooo muchh!!

itss supper simplee so itss easyy!! :DD

i have a test tomorrow soo thankkx :D!!!!!

plzz makee more vidss :D im preetty suree

ill need it later :3 :DD

[caseman5380]

thanks :)

[genemalu]

it was a great help from u ..its superb!

but how 2 draw a graph and find the domain and range wen a question is given?

[nataliesvidz]

You rock. 

[lsciola2]

brillant!!!!!!

[squirrelldog777]

ur the shit man

[VictorAndScience]

I love this theme cause it's really easy!

Thanks for your mathepedia! HAHAH

Hey, what did you study back in college.... Kinda want to be like you :)